Development of omni-directional directional detectors (FRIE), 2; Imaging algorithms using inverse problem analysis

Sasaki, Miyuki  ; Sanada, Yukihisa   ; Torii, Tatsuo*  

The FRIE detector has equal sensitivity to incoming radiation from all directions and identify the direction of incoming radiation based on the difference in response characteristics of individual detectors. An inverse problem analysis algorithm was constructed to simulate radiation incident from multiple directions and reconstruct an image, assuming actual imaging. The inverse problem algorithm is based on Map-EM, and the algorithm incorporates direction vectors from the sensitivity difference of each detector to achieve high accuracy. A new beta and gamma-ray radiation imaging system has been developed. In this presentation, as the second in the series of presentations, we report on the reconstruction method for gamma-ray imaging based on detector data.